Practice Test One Flashcards
Four entrance cables providing service to a house indicates :
Three-phase service
In balloon framing, the studs are:
Continuous from foundation to the roof line
What does voltage measure ?
Electrical pressure
Match the breaker amperage with copper wire sizes of 8,10,12,14
40,30,20,15
What is the maximum number of shut offs to disconnect all power for a main panel?
Six
In most cases chimney deterioration is caused from
Water/ moisture caused by condensation
Given that you have a #6 AWG copper wire,100 amp main breaker and a panel rated for 150 amps,what is the service amperage?
60 and a safety hazard
In receptacle wiring,which slot is hot?
Small
A crack that increases along its path is called ?
V-crack
Which of the following is not part of the structural inspection? A.foundation walls B.interior finished material C.roof framing member D.girders and floor joist
B. interior finished material
What is a sign of water penetration through a foundation wall?
Efflorescence on the wall
The ground immediately adjacent to the foundation should be ?
Sloped away from the foundation at the rate of 1” per ft for at least the first 6’
Three entrance cables providing service to a house indicates :
120/240 volts
Two basic forces individual structural components are subjected to are?
Compression/tension
The recommended minimum clearance between a floor joist and the dirt floor of a crawl space without having to use treated lumber is:
18”
What is the maximum space most building codes allow balusters or railings to have between them?
4”
What is efflorescence ?
Is a white salty deposit which appears on many masonry walls and floors
Which is the steepest roof ? A.2/12 slope B.4/12 C.3/12 D.6/12
D.6/12 slope
How might a rafter spread be noticed from the exterior of the home?
Separation of the soffits from the wall
What is a counter flashing ?
A second layer of flashing that covers a bottom layer of flashings
What is truss uplift?
A bowing upward of the truss’s bottom cord
The two main components if an Air-cooled air conditioning system are:
Evaporator unit and the condensing unit
What is a small peaked roof construction in the high side if a chimney called?
Cricket
What type of roof requires on interlayment of felt between courses?
Wood shakes
A 4-ply built up roof would have?
4 layers of felt and 4 layers is bitumen
Which siding becomes brittle in cold weather ?
Vinyl
The three main components of a stairway are:
Stringers,risers,and treads
What is the acceptable depth of treads, according to most building codes ?
9” to 11”
What siding has the tendency to expand and contract the most?
Vinyl
The three major components of a fossil fuel forced air furnace are:
Heat exchanger,burner,blower
The function of a fan/limit switch is to:
Control when the fan comes on or off and to shut off the burners if the furnace overheats
What is the lightest weight copper pipe ?
Type M
Which type of supply pipe will rust from the inside out?
Galvanized steel
What should be reported as a safety hazard ?
A. Use of CPVC piping
B. cross connection
C.greenish color at joints in copper piping
D.handyman plumbing
B. cross connection
A drain that gurgles or belches as it drains water may be a symptom of?
A missing vent
What condition with a gas water heater should be reported as a safety hazard? A. Holes in a flue pipe B. a leaking tank C.rusting in heating chamber D.plastic water supply pipes
A. Holes in a flue pipe
What does hissing an gurgling in. Electric water heater indicate ?
There is sediment in the tank
How much exposure is proper for an 18” shake roof
7 1/2”
Ground rods must be driven into the ground at least
8 feet
Residential entrance cables must have minimum clearance over a driveway of
12’
If cracks appear serious, you may suggest :
Further investigation by an engineer
In a hydronic systems , the normal operating pressure is
12-15 psi
The Hartford loop in a steam system
Precludes siphon action if the unit develops a leak
Another name for a 4-way valve
Reversing valve
What is the purpose of an accumulator ?
Keep liquid refrigerant out of the compressor
The most likely area to find a crack or hole in the heat exchanger is:
In front, behind the heat shield
A good sign that there is a crack or hole in the heat exchanger is?
- Irregular flame pattern when blower is on
- severe rusting of the heat exchanger
- strange smells at the register
Proper attic ventilation helps to :
- prevent structure damage caused by moisture
- increase the life of the roofing material
- reduce energy consumption
